$nav-color: #F90

nav
  $width: 100px

  width: $width
  height: $width
  color: $nav-color
  background: red

#main p
  color: #00ff00
  width: 97%

  .redbox
    background-color: #ff0000
    color: #000000

#main
  width: 97%

  p, div
    font-size: 2em

    a
      font-weight: bold

  pre
    font-size: 3em
